在1.7版本中,TypeScript支持Async函数(目前仅对ES6对象支持)。可以在函数名称之前声明async来将其命名为一个异步函数。await关键字可以在async函数条件不满足时阻塞函数。以下是一个简单的例子。 "use strict"; // printDelayed is a 'Promise<void>' async function printDelayed(elements: string[]) { for (cons...
/*** 获取店铺签约合同信息* @access http://api.xxx.com/getUserNameByTagIdFromServer* @param tagId 标签id {number}* @returns name 用户名称 {string}*/asyncfunctionqueryUserNameByTagId(tagId:string){constuserName=awaitgetUserNameByTagIdFromServer(tagId);returnuserName;} interface interfaceIUser{/...
import Api from "typing/Api"; declare var sails: any; /** * 查询 * @param req * @param res * @param next */ export async function retrieve(req: Api.SailsRequest, res: Api.Response, next: Function): Promise<any> { let User = <UserModel.UserInstance>sails.models.user; let rows =...
async function makeRequest(url: string, log?: (msg: string) => void) { log?.(`Request started at ${new Date().toISOString()}`); // roughly equivalent to // if (log != null) { // log(`Request started at ${new Date().toISOString()}`); // } const result = (await fetch(...
asyncfunction changePage(state: State, newPage:string) { state.requests[newPage]= { state:"pending"}; state.currentPage=newPage;try{constresponse =awaitfetch(getUrlForPage(newPage));if(!response.ok) {thrownewError(`无法正常加载页面 ${newPage}: ${response.statusText}`); ...
declarefunction sayHello(hello:string):void; 现在我们可以在代码中使用sayHello函数。 如何声明一个类? 声明类时,只需编写类结构,而不编写每个函数的实现。 这是一个例子: declareclassAnimal{constructor(name:string);eat():void;sleep():void;} 我们现在可以在代码中实例化Animal类。
declare function MaybePromise<T>(value: T): T | Promise<T> | PromiseLike<T>; async function doSomething(): Promise<[number, number]> { const result = await Promise.all([ MaybePromise(100), MaybePromise(200) ]); // Error! // // [number | Promise<100>, number | Promise<200>] ...
export declare interface AppProps { children1: JSX.Element; // ❌ 不推荐 没有考虑数组 children2: JSX.Element | JSX.Element[]; // ❌ 不推荐 没有考虑字符串 children children4: React.ReactChild[]; // 稍微好点 但是没考虑 null
name:stringphone:string}declarefunctiongetCustomerData(id:string):Promise<Customer>;declarefunctionpayCustomer(customer: Customer):void; asyncfunctionf(){constcustomer=getCustomerData('c1')payCustomer(customer) } 以前的 TypeScript 完全不了解 Promise,并显示一条与其无关的错误消息,如下所示: ...
declare function styledInput<OtherProps>( strs: TemplateStringsArray, ...fns: ((props: OtherProps & StyleProps) => string)[]): React.Component<OtherProps>; Similar to the above example, TypeScript would have no way to infer the type ofOtherPropsif the functions passed tofnswere not annot...